In-operando x-ray imaging on alkaline electrolyzer for improved understanding of bubble dynamics

Green hydrogen produced via electrolysis is predicted to be a key technology to enabling the green energy transition. For decreasing the green hydrogen cost to comparable levels to hydrogen produced by steam reforming, the electrolyzer systems must be optimised. One of the most significant energy losses during electrolyzer operation at industrial conditions is due to inefficient mass transport. Previous neutron radiographic measurements have indicated that bubbles are immobilized in industrial porous foam electrodes, effectively increasing the resistance and decreasing the available surface area in the system. By performing x-ray imaging we will be able to study the growth, movement, and distribution of bubbles for improved understanding on this critical topic. The electrolyzer is constructed in cooperation with the industry to obtain the most industrially relevant and accurate knowledge on bubble dynamics.